diff options
| -rw-r--r-- | drivers/hwmon/tmp102.c | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/drivers/hwmon/tmp102.c b/drivers/hwmon/tmp102.c index fd4a4515692a..82a8a29af2e4 100644 --- a/drivers/hwmon/tmp102.c +++ b/drivers/hwmon/tmp102.c @@ -47,6 +47,17 @@ #define TMP102_TLOW_REG 0x02 #define TMP102_THIGH_REG 0x03 +#define TMP102_CONFREG_MASK (TMP102_CONF_SD | TMP102_CONF_TM | \ + TMP102_CONF_POL | TMP102_CONF_F0 | \ + TMP102_CONF_F1 | TMP102_CONF_OS | \ + TMP102_CONF_EM | TMP102_CONF_AL | \ + TMP102_CONF_CR0 | TMP102_CONF_CR1) + +#define TMP102_CONFIG_CLEAR (TMP102_CONF_SD | TMP102_CONF_OS | \ + TMP102_CONF_CR0) +#define TMP102_CONFIG_SET (TMP102_CONF_TM | TMP102_CONF_EM | \ + TMP102_CONF_CR1) + #define CONVERSION_TIME_MS 35 /* in milli-seconds */ struct tmp102 { @@ -167,9 +178,6 @@ static struct attribute *tmp102_attrs[] = { }; ATTRIBUTE_GROUPS(tmp102); -#define TMP102_CONFIG (TMP102_CONF_TM | TMP102_CONF_EM | TMP102_CONF_CR1) -#define TMP102_CONFIG_RD_ONLY (TMP102_CONF_R0 | TMP102_CONF_R1 | TMP102_CONF_AL) - static const struct thermal_zone_of_device_ops tmp102_of_thermal_ops = { .get_temp = tmp102_read_temp, }; @@ -210,26 +218,25 @@ static int tmp102_probe(struct i2c_client *client, dev_err(dev, "error reading config register\n"); return status; } + + if ((status & ~TMP102_CONFREG_MASK) != + (TMP102_CONF_R0 | TMP102_CONF_R1)) { + dev_err(dev, "unexpected config register value\n"); + return -ENODEV; + } + tmp102->config_orig = status; devm_add_action(dev, tmp102_restore_config, tmp102); - status = i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, - TMP102_CONFIG); + status &= ~TMP102_CONFIG_CLEAR; + status |= TMP102_CONFIG_SET; + + status = i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, status); if (status < 0) { dev_err(dev, "error writing config register\n"); return status; } - status = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG); - if (status < 0) { - dev_err(dev, "error reading config register\n"); - return status; - } - status &= ~TMP102_CONFIG_RD_ONLY; - if (status != TMP102_CONFIG) { - dev_err(dev, "config settings did not stick\n"); - return -ENODEV; - } mutex_init(&tmp102->lock); |